Abstract
The phase equilibria in the Sc–Zr–C system were investigated for the first time using metallography, differential thermal analysis (DTA), X-ray powder patterns (XRD), and electron probe microanalysis (EPMA). The projections of the solidus and liquidus surfaces were constructed. A continuous solid solution was found to form between isomorphous (NaCl-type) carbides of scandium and zirconium. As the thermodynamically most stable phase, the δ-NaCl-type phase is in equilibrium with all the phases that exist at subsolidus temperatures. The microhardness of this phase at the carbon-rich boundary of the homogeneity range decreases monotonously from 2970 kg mm −2 for ZrC 1− x to 1100 kg mm −2 for ScC 1− x . There are two four-phase incongruent-type equilibria with participation of the liquid phase: L+δ+β-Sc 4C 3⇄Sc 3C 4 (1810°C) and L+δ⇄Sc 3C 4+C (1737°C).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
